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mario62 [17]
3 years ago
6

Explain the formation of a waterfall 12 marks​

Geography
2 answers:
swat323 years ago
7 0

Answer:

Waterfalls often form in the upper stages of a river where it flows over different bands of rock. It erodes soft rock more quickly than hard rock and this may lead to the creation of a waterfall.

Formation of a waterfall:

▪︎The soft rock erodes more quickly, undercutting the hard rock.

▪︎The hard rock is left overhanging and because it isn’t supported, it eventually collapses.

▪︎The fallen rocks crash into the plunge pool. They swirl around, causing more erosion.

▪︎Over time, this process is repeated and the waterfall moves upstream.

▪︎A steep-sided gorge is formed as the waterfall retreats.

Gemiola [76]3 years ago
5 0

Answer:

<u><em>A waterfall is an erosional landform, which occurs where there is a layer of hard rock on top of a layer of softer rock. Erosional processes such as hydraulic action and abrasion occur as the river flows downstream, however differential erosion takes place as the softer rock erodes faster.</em></u>

Explanation:

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Answer:

The passenger aircraft would take 10.542 years to reach the Sun from the Earth.

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\Delta t = \frac{s}{v} (1)

Where:

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v - Speed of the passenger aircraft, measured in kilometers per second.

\Delta t - Travelling time, measured in seconds.

If we know that s = 1.496\times 10^{8}\,km and v = 0.45\,\frac{km}{s}, then the travelling time is:

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\Delta t = 3.324\times 10^{8}\,s

\Delta t = 3847.736\,days

\Delta t = 10.542\,years

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\Delta t = \frac{2.460\times 10^{17}\,km}{0.45\,\frac{km}{s} }

\Delta t = 5.467\times 10^{17}\,s

\Delta t = 6.327\times 10^{12}\,days

\Delta t = 1.733\times 10^{10}\,years

The passenger aircraft would take 1.733\times 10^{10} years to reach the gallactic center.

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